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<head>
    <meta charset="UTF-8">
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    <title>学习three.js</title>
    <style>
        body{
            margin: 0;
            overflow: hidden;
        }
    </style>
</head>
<body>
    <div id="threeApp"></div>
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        请开启JavaScript脚本运行，否则页面将无法运行。
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</body>
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